Better Molotoovs (#11128)

Molotovs now work off both alcohol and welding fuel.
    Molotovs now longer emit light if an unlit rag is inserted.
    Molotov rags now properly delete when they burn out.

code/modules/reagents/reagent_containers/food/drinks/bottle.dm

@@ -101,12 +101,20 @@
 		update_icon()
 
 /obj/item/reagent_containers/food/drinks/bottle/proc/remove_rag(mob/user)
-	if(!rag) return
+	if(!rag)
+		return
 	user.put_in_hands(rag)
 	rag = null
 	flags |= (initial(flags) & OPENCONTAINER)
 	update_icon()
 
+/obj/item/reagent_containers/food/drinks/bottle/proc/delete_rag()
+	if(!rag)
+		return
+	QDEL_NULL(rag)
+	flags |= (initial(flags) & OPENCONTAINER)
+	update_icon()
+
 /obj/item/reagent_containers/food/drinks/bottle/open(mob/user)
 	if(rag)
 		return
@@ -114,13 +122,14 @@
 
 /obj/item/reagent_containers/food/drinks/bottle/update_icon()
 	underlays.Cut()
+	set_light(0)
 	if(rag)
 		var/underlay_image = image(icon='icons/obj/drinks.dmi', icon_state=rag.on_fire? "[rag_underlay]_lit" : rag_underlay)
 		underlays += underlay_image
-		set_light(2)
-	else
-		set_light(0)
-		..()
+		if(rag.on_fire)
+			set_light(2, l_color = LIGHT_COLOR_FIRE)
+		return
+	..()
 
 /obj/item/reagent_containers/food/drinks/bottle/attack(mob/living/target, mob/living/user, var/hit_zone)
 	var/blocked = ..()